On Nov 17, 2020, at 7:43 AM, Seth Deegan <[email protected]> wrote: > A contributor can obtain data from many different sources within each > changeset. Pushing the tag to the changeset meta data invalidates it's > limited usefulness when added to individual objects. > > Exactly.
I never said to NOT use source=* tags, they are correctly used on an individual datum if / as it might diverge from a greater set of data that otherwise has another source. In short, if ALL of the data are from a single source, use a changeset comment to note this. If not, source=* tags are appropriate. > I've found published data (from the authority > authorised to amend the route) are often too inaccurate, out of date or > lacking in detail to warrant transferring to OSM. Then, don’t import, curate or transfer them to OSM. I don’t believe we want "inaccurate, out-of-date or lacking in detail data" in OSM. > I find the opposite and I mostly map cycle routes that are local and I have > personally traveled on (I live in the Chicago metropolitan area). There are > just too many sources for trail names and data from forest preserve > districts/counties, cities, regional routes, etc. that I make routes from. I > can't just remember all of the trail names I come across (I don't survey). It is good to enter source data when you know them. However, it won’t be the downfall of OSM if you don’t. > What I still don't understand is why you all are discouraging the use of > source=* tag (or maybe you're not?). Because it seems that it can still be of > use to some people. Why not let users know on the Wiki page that they can use > the tag if they might find a specific source helpful to other users, but that > they shouldn't tag imagery or other general sources per-element and instead > tag it on the changeset? Thank you for agreeing ael. I don’t believe I did “discourage” the use of source=* although I regret if I gave the list that impression. I believe I said changeset comments noting the source of the data “largely deprecates” using specific source=* tags on each specific datum, because I have gotten in the habit of (and think it a good idea) keeping my changes to those which derive from a specific source (whether “official” data or not, as I’ll enter “personal survey” or “my own GPX tracks” if true) in a single changeset. However, knowing it is true that this isn’t always the case, OSM does reserve the flexibility to say “from County of Foobar GIS Department” in a changeset comment while SOME data in that same changeset might contain individual source=* tags of “personal survey” or “GPS wander, 2020-11-17,” for example. This isn’t a perfect system, I will not get sanctioned if I don’t enter the true source of every single datum I enter in OSM, but I do strive to identify my sources, less so individual-datum-at-a-time (though, I’ll still do that if there is the divergence I note here), moreso via a changeset comment that identifies that most or all of my data are from a single source (like one layer of satellite imagery, for example). SteveA _______________________________________________ Tagging mailing list [email protected] https://lists.openstreetmap.org/listinfo/tagging
